Experimental Investigation on Adsorption of Methyl orange Using eggshells as adsorbent Surface

Abstract

The role of residues in the adsorption process for removing contaminants from their aqueous solution was highlighted in this study. The adsorption capacity of eggshells were used to remove the methyl orange dye from its aqueous solution. The highest dye adsorption was found to range between (62.30% to 62.33%). The results of using adsorption isotherms (Freundlich, Langmuir, and Temkin) have been revealed that the Freundlich model was followed and that the Langmuir model did not match, as well as the partial applicability of Temkin's model at temperatures (298,308,318) K. The process of adsorption is a physical one. Three kinetic models of the adsorption process were also used, with the results demonstrating the applicability of the pseudo-second-order model. In this study, the thermodynamic functions were estimated using the value of the enthalpy ΔH°, which was negative and equal to (-4.7685 KJ/mole), The process was discovered to be exothermic, and the entropy ΔS° value was also negative, equaling (- 11.5100 J/mole.K), indicating a decrease in the randomness of adsorption when added to the Gibbs free energy ΔG°, indicating that the reaction occurred spontaneously.

Eggshell-Lignin Carbon Composite for Methyl Orange Removal from Wastewater

“…1.23 mg/g. There have been numerous studies focusing on the utilization of adsorbents prepared from eggshells, 38 eggshell membranes, 39 and the mixture of egg white and eggshells 40 for MO removal but the prepared adsorbents are limited by their low adsorption performance. However, few adsorbents like polyurethane/ polyaniline 41 showed comparable adsorption capacity, 225 mg/g, but the preparation of these materials from nonrenewable cost-intensive feedstock raises questions on their capability.…”

Application of Silica from Beach Sand in the Synthesis of Calcium-Alginate-Silica as Adsorbent of Na+ and Cl- Ions

“…This is due to the fact that adsorbents with gel morphology have a larger pore volume than those in powder form. Nasir et al (2023) investigated the adsorption capacity of methyl orange with CaCO3 and gel-shaped CaCO3-alginate from powdered eggshells of 2.69 and 2.71 mg/g, respectivel [10]. One of the gelling agents is the alginate compound, which has an active carboxyl group (COO -) and a hydroxyl group (OH -) [11].…”